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Finding the Fourth Proportional to 886.97, 1,223.97 and 488.63

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Solution

The fourth proportional to 886.97, 1,223.97 and 488.63 is: 674.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.97 : 1,223.97 = 488.63 : x
  2. Step 2: Convert to fraction form
    886.97/1,223.97 = 488.63/x
  3. Step 3: Cross multiply
    886.97x = 1,223.97 × 488.63
  4. Step 4: Simplify right side
    886.97x = 598,068.46
  5. Step 5: Solve for x
    x = 598,068.46/886.97
  6. Step 6: Final answer
    x = 674.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.